2000/- plan not able to activate from last 15 days

Dear Team,
I have recieveed ₹2,000/month unlimited trades via Upstox API offer few days back through whats ap and email. But finding the below error & not able to activate offer. Kindly resolve & revert.

Hi @UMESH_HANU_2251238,

Have DM-ed you regarding this. Please check and respond, thanks.

2000/ month, if it come down to 500 then it might be worth it.